Notes: Boone passes physical; former Raiders CB among those who fill practice squad

Right guard Alex Boone passed his physical Monday and officially rejoined the 49ers in advance of Sunday’s season opener at Dallas.

Boone has been on the reserve/did-not-report list since the start of training camp, a result of his contract holdout that lasted through the offseason to Sunday’s restructuring of his contract.

The 49ers asked the league for a roster exemption before making a corresponding personnel move that would allow him to play in a game. The most likely scenario: nose tackle Glenn Dorsey reverts Tuesday to injured reserve/designated-for-return, clearing a spot for Boone on the 53-man roster.

Seeing how he passed his physical, Boone would seem poised to start Sunday’s game, otherwise Joe Looney will get the call like he did through the exhibition season.

Boone’s two-year deal has a maximum value of $8 million, including $6 million in base salaries with the preclusion of him being franchise tagged in 2016, a league source said.

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The 10-man practice squad was filled out by cornerback Chance Casey, offensive tackle John Fullington and running back Kendall Gaskins.

Casey (5-foot-11, 190 pounds) spent last season on the Raiders’ practice squad and got cut by them Saturday.

Fullington (6-5, 300) failed to make the Packers squad as an undrafted rookie out of Washington State.

Gaskins (6-1, 238) was cut Saturday by the Giants, who signed him to their practice squad Dec. 17 after the University of Richmond product had stints with the Buffalo Bills and Tennessee Titans.